Asset bundle not loading because of platform incompatibility

I have an android app made with Unity and whenever I try to load my asset bundles inside unity I get this error :

my build API level

however I built my asset bundles in API Level 16 and when I build the app with API Level 16 & 19 doesnt make difference still gives me the same error

As the error states that you are trying to load an asset bundle in android platform which is not build for android platform. Please use below code for specific platform. I am sure you have follow this which by default builds for windows only.

using UnityEditor;
using System.IO;

public class CreateAssetBundles
{
    [MenuItem("Assets/Build AssetBundles")]
    static void BuildAllAssetBundles()
    {
        string assetBundleDirectory = "Assets/AssetBundles";
        if(!Directory.Exists(assetBundleDirectory))
        {
            Directory.CreateDirectory(assetBundleDirectory);
        }
        BuildPipeline.BuildAssetBundles(assetBundleDirectory, 
                                        BuildAssetBundleOptions.None, 
                                        EditorUserBuildSettings.activeBuildTarget);
    }
}

This code will build asset bundle for current selected platform.